Re: B-tension screw

On 5/21/2025 12:50 PM, Beej Jorgensen wrote:

In article <100l37d$2u569$4@dont-email.me>,
zen cycle  <funkmasterxx@hotmail.com> wrote:

As andrew notes the derailleur body should move when the B-screw is
adjusted. It is doesn't, see if the screw end of the screw is actually
contacting anything.

 I'm not sure how to peer into the body of the derailleur (maybe the
cover just pops off?), but it most definitely feels like it's not
contacting anything. It turns freely by hand the full range, and it even
wobbles back and forth a bit if you jiggle it. The only place it feels
like it's making contact is on the threads it screws into.
 -Beej
 

Does the screw advance and return when you screw/unscrew it?
Look on the back side and see what, if anything, that screw hits. There should be a stop with a protrusion shaped something like this:
http://www.yellowjersey.org/photosfromthepast/sisendb.jpg
If that screw is wandering in midair or not actually moving when you turn it, consult an LBS for a quick opinion. You may need a derailleur, but then again you may not.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971